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hello.asm

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+    .assume adl=1       ; ez80 ADL memory mode
+    .org $40000         ; load code here
+
+    jp start_here       ; jump to start of code
+
+    .align 64           ; MOS header
+    .db "MOS",0,1     
+
+
+start_here:
+            
+    push af             ; store all the registers
+    push bc
+    push de
+    push ix
+    push iy
+
+; ------------------
+; This is our actual code
+
+    ld hl, string       ; address of string to use
+    ld bc,0             ; length of string, or 0 if a delimiter is used
+    ld a,0              ; A is the delimiter 
+    rst.lil $18         ; Call the MOS API to send data to VDP 
+
+; ------------------
+; This is where we exit the program
+
+    pop iy              ; Pop all registers back from the stack
+    pop ix
+    pop de
+    pop bc
+    pop af
+    ld hl,0             ; Load the MOS API return code (0) for no errors.    
+    ret                 ; Return to MOS
+
+; ------------------
+
+string:
+    .db "Hello Agon World\r\n",0 
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text.asm

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+    .assume adl=1                       ; ez80 ADL memory mode
+    .org $40000                         ; load code here
+
+    jp start_here                       ; jump to start of code
+
+    .align 64                           ; MOS header
+    .db "MOS",0,1     
+
+start_here:
+            
+    push af                             ; store all the registers
+    push bc
+    push de
+    push ix
+    push iy
+
+; ------------------
+; This is our actual code
+
+; Sending VDU commands byte by byte
+
+    ld a, 22
+    rst.lil $10                         ; set screen mode...
+    ld a, 8
+    rst.lil $10                         ; to mode 8, 320x240 64 colours
+
+
+; Sending a VDU byte stream
+
+    ld hl, VDUdata                      ; address of string to use
+    ld bc, endVDUdata - VDUdata         ; length of string
+    rst.lil $18                         ; Call the MOS API to send data to VDP 
+
+; ------------------
+; This is where we exit the program
+
+    pop iy                              ; Pop all registers back from the stack
+    pop ix
+    pop de
+    pop bc
+    pop af
+    ld hl,0                             ; Load the MOS API return code (0) for no errors.
+    ret                                 ; Return to MOS
+
+; ------------------
+; This is the data we send to VDP
+
+VDUdata:
+    .db     17, 0                       ; set text colour, 0 = black, 1 = red, etc
+    .db     17, 11 + 128                ; set text background, +128 for background
+    .db     31, 10, 10                  ; TAB to 10,20
+    .db     "Hello Agon coders\r\n"     ; print this text
+    .db     17, 15                      ; reset text colour, 15 = bright white
+    .db     17, 0 + 128                 ; reset text background, +128 for background
+endVDUdata:
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